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kbuild: deb-pkg: set CROSS_COMPILE only when undefined

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Commit 3ab18a625c ("kbuild: deb-pkg: improve the usability of source
package") set needless CROSS_COMPILE.

For example, 'make allnoconfig bindeb-pkg' on a x86_64 system will set
CROSS_COMPILE=i686-linux-gnu-, where the biarch compiler 'gcc' should
work for building the i386 kernel.

  $ uname -m
  x86_64
  $ make allnoconfig bindeb-pkg >/dev/null
  dpkg-architecture: warning: specified GNU system type i686-linux-gnu does not match CC system type x86_64-linux-gnu, try setting a correct CC environment variable
   dpkg-source --before-build .
   debian/rules binary
  scripts/Kconfig.include:39: C compiler 'i686-linux-gnu-gcc' not found
  make[6]: *** [scripts/kconfig/Makefile:77: olddefconfig] Error 1
  make[5]: *** [Makefile:693: olddefconfig] Error 2
  make[4]: *** [Makefile:358: __build_one_by_one] Error 2
  make[3]: *** [debian/rules:7: build-arch] Error 2
  dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
  make[2]: *** [scripts/Makefile.package:127: bindeb-pkg] Error 2
  make[1]: *** [Makefile:1657: bindeb-pkg] Error 2
  make: *** [Makefile:358: __build_one_by_one] Error 2

Check whether CROSS_COMPILE is defined, instead of whether it is non-empty.

If you invoke debian/rules via Kbuild, CROSS_COMPILE is always defined
in the top Makefile.

Fixes: 3ab18a625c ("kbuild: deb-pkg: improve the usability of source package")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada 2023-03-13 05:07:28 +09:00
parent 7a531c21f8
commit f50aa51c44
1 changed files with 2 additions and 3 deletions
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5
scripts/package/deb-build-option
View File

@ -1,9 +1,8 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only
# Set up CROSS_COMPILE if we are cross-compiling, but not called from the
# kernel toplevel Makefile
if [ -z "${CROSS_COMPILE}${cross_compiling}" -a "${DEB_HOST_ARCH}" != "${DEB_BUILD_ARCH}" ]; then
# Set up CROSS_COMPILE if not defined yet
if [ "${CROSS_COMPILE+set}" != "set" -a "${DEB_HOST_ARCH}" != "${DEB_BUILD_ARCH}" ]; then
echo CROSS_COMPILE=${DEB_HOST_GNU_TYPE}-
fi